公开(公告)号：US20200071606A1

公开(公告)日：2020-03-05

申请号：US16553263

申请日：2019-08-28

Applicant: NICHIA CORPORATION

Inventor： Naoto FUJIOKA ,  Tadayoshi YANAGIHARA ,  Keisuke SUZUKI ,  Hiroshi OGASA

IPC: C09K11/02 ,  C09K11/77

Abstract: Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide. (Lni-aCea)3Al5O12   (I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0

公开(公告)号：US20210179932A1

公开(公告)日：2021-06-17

申请号：US17167763

申请日：2021-02-04

Applicant: NICHIA CORPORATION

Inventor： Tadayoshi YANAGIHARA ,  Naoto FUJIOKA ,  Keisuke SUZUKI

IPC: C09K11/02 ,  C04B35/117 ,  C04B35/645 ,  F21V9/30 ,  C09K11/77 ,  C04B35/44 ,  C04B35/626

Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12  (I) wherein a and b satisfy 0≤a≤0.3 and 0

公开(公告)号：US20170166811A1

公开(公告)日：2017-06-15

申请号：US15371957

申请日：2016-12-07

Applicant: NICHIA CORPORATION

Inventor： Naoto FUJIOKA

IPC: C09K11/77 ,  B05D1/18

CPC classification number: C09K11/7774 ,  B05D1/18

Abstract: A method of producing hybrid fluorescent material includes dispersing Lu3Al5O12:Ce fluorescent material particles in a first solution; mixing the first solution in a second solution, the second solution including a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum and/or gallium, and a third metallic salt containing cerium, wherein the mixing attaches (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material precursor particles on surfaces of the Lu3Al5O12:Ce fluorescent material particles to obtain a hybrid fluorescent material precursor; separating the hybrid fluorescent material precursor particles from the first and second solutions; and calcining the hybrid fluorescent material precursor particles to obtain a hybrid fluorescent material of Lu3Al5O12:Ce fluorescent material particles covered by (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material.